The Sacco is a river of central Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

, a right tributary of the Liri

Liri

The Liri is one of the principal rivers of central Italy, flowing into the Tyrrhenian Sea a little below Minturno under the name Garigliano....

.

The river is formed by the confluence of two streams of the Monti Simbruini

Monti Simbruini

The Monti Simbruini are a mountain range in central Italy, part of Apennines, on the border between the Lazio and Abruzzo regions. They border with the Monti Cantari and the Ciociaria....

 in the Apennines of Abruzzo

Abruzzo

Abruzzo is a region in Italy, its western border lying less than due east of Rome. Abruzzo borders the region of Marche to the north, Lazio to the west and south-west, Molise to the south-east, and the Adriatic Sea to the east...

. It flows towards south-east for a total of 87 km, crossing Ciociaria

Ciociaria

Ciociaria is the name of a traditional region of Central Italy without a defined border nor historical identity. The name was adopted by a fascist movement of Frosinone as an ethnical denomination for the province of Frosinone, when it was created in 1927....

 between the mountain ranges of the Ernici

Monti Ernici

The Monti Ernici are a mountain range in central Italy, part of the sub-Apennines of Lazio. They are bounded by the valley of the river Aniene to the north-east, that of the Liri to the east, and, from south to west, by the valleys of the Cosa and Sacco...

 to the north-east, and of the Lepini

Monti Lepini

The Monti Lepini are a mountain range which belongs to the Anti-Apennines of the Lazio region of central Italy, between the two provinces of Latina and Rome....

 to the south-west. It flows into the Liri near Ceprano

Ceprano

Ceprano is a town and comune in the province of Frosinone, in Ciociaria traditional area, part of the Lazio region of central Italy.It is located south of Rome, and c. 127 km north of Naples.-History:...

, in the Lazio.

The Sacco's main tributaries are the Cosa and the Alabro.

In the Frosinone area

Province of Frosinone

The Province of Frosinone is a province in the Lazio region of Italy, with 91 comuni . Its capital is the city of Frosinone. It has an area of 3,244 km², and a total population of 489,042 .The Province was established by Royal Decree on 6 December 1926 with territories belonging to Lazio...

it is known also the Tolero, from its ancient name Tolerus or Trerus.